Finding the Fourth Proportional to 22,979.48, 31,710.49 and 12,908.34

Step by Step Solution

1. Step 1: Write the proportion equation
   22,979.48 : 31,710.49 = 12,908.34 : x
2. Step 2: Convert to fraction form
   22,979.48/31,710.49 = 12,908.34/x
3. Step 3: Cross multiply
   22,979.48x = 31,710.49 × 12,908.34
4. Step 4: Simplify right side
   22,979.48x = 409,329,754.22
5. Step 5: Solve for x
   x = 409,329,754.22/22,979.48
6. Step 6: Final answer
   x = 17,812.84